| 1 | /* |
| 2 | * i.MX drm driver - parallel display implementation |
| 3 | * |
| 4 | * Copyright (C) 2012 Sascha Hauer, Pengutronix |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 18 | * MA 02110-1301, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/module.h> |
| 22 | #include <drm/drmP.h> |
| 23 | #include <drm/drm_fb_helper.h> |
| 24 | #include <drm/drm_crtc_helper.h> |
| 25 | #include <linux/videodev2.h> |
| 26 | |
| 27 | #include "imx-drm.h" |
| 28 | |
| 29 | #define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector) |
| 30 | #define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder) |
| 31 | |
| 32 | struct imx_parallel_display { |
| 33 | struct drm_connector connector; |
| 34 | struct imx_drm_connector *imx_drm_connector; |
| 35 | struct drm_encoder encoder; |
| 36 | struct imx_drm_encoder *imx_drm_encoder; |
| 37 | struct device *dev; |
| 38 | void *edid; |
| 39 | int edid_len; |
| 40 | u32 interface_pix_fmt; |
| 41 | int mode_valid; |
| 42 | struct drm_display_mode mode; |
| 43 | }; |
| 44 | |
| 45 | static enum drm_connector_status imx_pd_connector_detect( |
| 46 | struct drm_connector *connector, bool force) |
| 47 | { |
| 48 | return connector_status_connected; |
| 49 | } |
| 50 | |
| 51 | static void imx_pd_connector_destroy(struct drm_connector *connector) |
| 52 | { |
| 53 | /* do not free here */ |
| 54 | } |
| 55 | |
| 56 | static int imx_pd_connector_get_modes(struct drm_connector *connector) |
| 57 | { |
| 58 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); |
| 59 | struct device_node *np = imxpd->dev->of_node; |
| 60 | int num_modes = 0; |
| 61 | |
| 62 | if (imxpd->edid) { |
| 63 | drm_mode_connector_update_edid_property(connector, imxpd->edid); |
| 64 | num_modes = drm_add_edid_modes(connector, imxpd->edid); |
| 65 | } |
| 66 | |
| 67 | if (imxpd->mode_valid) { |
| 68 | struct drm_display_mode *mode = drm_mode_create(connector->dev); |
| 69 | drm_mode_copy(mode, &imxpd->mode); |
| 70 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, |
| 71 | drm_mode_probed_add(connector, mode); |
| 72 | num_modes++; |
| 73 | } |
| 74 | |
| 75 | if (np) { |
| 76 | struct drm_display_mode *mode = drm_mode_create(connector->dev); |
| 77 | of_get_drm_display_mode(np, &imxpd->mode, 0); |
| 78 | drm_mode_copy(mode, &imxpd->mode); |
| 79 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, |
| 80 | drm_mode_probed_add(connector, mode); |
| 81 | num_modes++; |
| 82 | } |
| 83 | |
| 84 | return num_modes; |
| 85 | } |
| 86 | |
| 87 | static int imx_pd_connector_mode_valid(struct drm_connector *connector, |
| 88 | struct drm_display_mode *mode) |
| 89 | { |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | static struct drm_encoder *imx_pd_connector_best_encoder( |
| 94 | struct drm_connector *connector) |
| 95 | { |
| 96 | struct imx_parallel_display *imxpd = con_to_imxpd(connector); |
| 97 | |
| 98 | return &imxpd->encoder; |
| 99 | } |
| 100 | |
| 101 | static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode) |
| 102 | { |
| 103 | } |
| 104 | |
| 105 | static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder, |
| 106 | const struct drm_display_mode *mode, |
| 107 | struct drm_display_mode *adjusted_mode) |
| 108 | { |
| 109 | return true; |
| 110 | } |
| 111 | |
| 112 | static void imx_pd_encoder_prepare(struct drm_encoder *encoder) |
| 113 | { |
| 114 | struct imx_parallel_display *imxpd = enc_to_imxpd(encoder); |
| 115 | |
| 116 | imx_drm_crtc_panel_format(encoder->crtc, DRM_MODE_ENCODER_NONE, |
| 117 | imxpd->interface_pix_fmt); |
| 118 | } |
| 119 | |
| 120 | static void imx_pd_encoder_commit(struct drm_encoder *encoder) |
| 121 | { |
| 122 | } |
| 123 | |
| 124 | static void imx_pd_encoder_mode_set(struct drm_encoder *encoder, |
| 125 | struct drm_display_mode *mode, |
| 126 | struct drm_display_mode *adjusted_mode) |
| 127 | { |
| 128 | } |
| 129 | |
| 130 | static void imx_pd_encoder_disable(struct drm_encoder *encoder) |
| 131 | { |
| 132 | } |
| 133 | |
| 134 | static void imx_pd_encoder_destroy(struct drm_encoder *encoder) |
| 135 | { |
| 136 | /* do not free here */ |
| 137 | } |
| 138 | |
| 139 | static struct drm_connector_funcs imx_pd_connector_funcs = { |
| 140 | .dpms = drm_helper_connector_dpms, |
| 141 | .fill_modes = drm_helper_probe_single_connector_modes, |
| 142 | .detect = imx_pd_connector_detect, |
| 143 | .destroy = imx_pd_connector_destroy, |
| 144 | }; |
| 145 | |
| 146 | static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = { |
| 147 | .get_modes = imx_pd_connector_get_modes, |
| 148 | .best_encoder = imx_pd_connector_best_encoder, |
| 149 | .mode_valid = imx_pd_connector_mode_valid, |
| 150 | }; |
| 151 | |
| 152 | static struct drm_encoder_funcs imx_pd_encoder_funcs = { |
| 153 | .destroy = imx_pd_encoder_destroy, |
| 154 | }; |
| 155 | |
| 156 | static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = { |
| 157 | .dpms = imx_pd_encoder_dpms, |
| 158 | .mode_fixup = imx_pd_encoder_mode_fixup, |
| 159 | .prepare = imx_pd_encoder_prepare, |
| 160 | .commit = imx_pd_encoder_commit, |
| 161 | .mode_set = imx_pd_encoder_mode_set, |
| 162 | .disable = imx_pd_encoder_disable, |
| 163 | }; |
| 164 | |
| 165 | static int imx_pd_register(struct imx_parallel_display *imxpd) |
| 166 | { |
| 167 | int ret; |
| 168 | |
| 169 | drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder); |
| 170 | |
| 171 | imxpd->connector.funcs = &imx_pd_connector_funcs; |
| 172 | imxpd->encoder.funcs = &imx_pd_encoder_funcs; |
| 173 | |
| 174 | imxpd->encoder.encoder_type = DRM_MODE_ENCODER_NONE; |
| 175 | imxpd->connector.connector_type = DRM_MODE_CONNECTOR_VGA; |
| 176 | |
| 177 | drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs); |
| 178 | ret = imx_drm_add_encoder(&imxpd->encoder, &imxpd->imx_drm_encoder, |
| 179 | THIS_MODULE); |
| 180 | if (ret) { |
| 181 | dev_err(imxpd->dev, "adding encoder failed with %d\n", ret); |
| 182 | return ret; |
| 183 | } |
| 184 | |
| 185 | drm_connector_helper_add(&imxpd->connector, |
| 186 | &imx_pd_connector_helper_funcs); |
| 187 | |
| 188 | ret = imx_drm_add_connector(&imxpd->connector, |
| 189 | &imxpd->imx_drm_connector, THIS_MODULE); |
| 190 | if (ret) { |
| 191 | imx_drm_remove_encoder(imxpd->imx_drm_encoder); |
| 192 | dev_err(imxpd->dev, "adding connector failed with %d\n", ret); |
| 193 | return ret; |
| 194 | } |
| 195 | |
| 196 | imxpd->connector.encoder = &imxpd->encoder; |
| 197 | |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | static int imx_pd_probe(struct platform_device *pdev) |
| 202 | { |
| 203 | struct device_node *np = pdev->dev.of_node; |
| 204 | const u8 *edidp; |
| 205 | struct imx_parallel_display *imxpd; |
| 206 | int ret; |
| 207 | const char *fmt; |
| 208 | |
| 209 | imxpd = devm_kzalloc(&pdev->dev, sizeof(*imxpd), GFP_KERNEL); |
| 210 | if (!imxpd) |
| 211 | return -ENOMEM; |
| 212 | |
| 213 | edidp = of_get_property(np, "edid", &imxpd->edid_len); |
| 214 | if (edidp) |
| 215 | imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL); |
| 216 | |
| 217 | ret = of_property_read_string(np, "interface-pix-fmt", &fmt); |
| 218 | if (!ret) { |
| 219 | if (!strcmp(fmt, "rgb24")) |
| 220 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24; |
| 221 | else if (!strcmp(fmt, "rgb565")) |
| 222 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565; |
| 223 | else if (!strcmp(fmt, "bgr666")) |
| 224 | imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666; |
| 225 | } |
| 226 | |
| 227 | imxpd->dev = &pdev->dev; |
| 228 | |
| 229 | ret = imx_pd_register(imxpd); |
| 230 | if (ret) |
| 231 | return ret; |
| 232 | |
| 233 | ret = imx_drm_encoder_add_possible_crtcs(imxpd->imx_drm_encoder, np); |
| 234 | |
| 235 | platform_set_drvdata(pdev, imxpd); |
| 236 | |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | static int imx_pd_remove(struct platform_device *pdev) |
| 241 | { |
| 242 | struct imx_parallel_display *imxpd = platform_get_drvdata(pdev); |
| 243 | struct drm_connector *connector = &imxpd->connector; |
| 244 | struct drm_encoder *encoder = &imxpd->encoder; |
| 245 | |
| 246 | drm_mode_connector_detach_encoder(connector, encoder); |
| 247 | |
| 248 | imx_drm_remove_connector(imxpd->imx_drm_connector); |
| 249 | imx_drm_remove_encoder(imxpd->imx_drm_encoder); |
| 250 | |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | static const struct of_device_id imx_pd_dt_ids[] = { |
| 255 | { .compatible = "fsl,imx-parallel-display", }, |
| 256 | { /* sentinel */ } |
| 257 | }; |
| 258 | MODULE_DEVICE_TABLE(of, imx_pd_dt_ids); |
| 259 | |
| 260 | static struct platform_driver imx_pd_driver = { |
| 261 | .probe = imx_pd_probe, |
| 262 | .remove = imx_pd_remove, |
| 263 | .driver = { |
| 264 | .of_match_table = imx_pd_dt_ids, |
| 265 | .name = "imx-parallel-display", |
| 266 | .owner = THIS_MODULE, |
| 267 | }, |
| 268 | }; |
| 269 | |
| 270 | module_platform_driver(imx_pd_driver); |
| 271 | |
| 272 | MODULE_DESCRIPTION("i.MX parallel display driver"); |
| 273 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); |
| 274 | MODULE_LICENSE("GPL"); |